Rainier Washington Climate Data

Monthly Average Climate Data for Rainier Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January34.0 °F46.2 °F7.1 in.
February33.7 °F49.2 °F4.83 in.
March35.7 °F53.5 °F5.47 in.
April38.6 °F58.7 °F4.0 in.
May44.1 °F65.8 °F2.4 in.
June48.5 °F70.4 °F2.01 in.
July52.1 °F77.4 °F0.67 in.
August52.2 °F78.3 °F1.05 in.
September47.9 °F72.2 °F1.95 in.
October41.9 °F60.7 °F4.77 in.
November36.7 °F50.8 °F8.3 in.
December33.6 °F45.2 °F7.54 in.
Annual41.6 °F60.7 °F50.09 in.

Climate Data for Rainier Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8a : 10°F to 15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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